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My battery life on Mini 4 seems pretty good. But the lag and framerate drops are unacceptable when I've spent this much money on a small tablet. Part of the reason I prefer iOS over Android is because Android often has random lags and hiccups. This is the first iOS device I've owned that behaves this way.

BTW, iOS 9.1 was officially released. I updated it yesterday, and it doesn't improve anything. I know from experience that it's not wise to take a gamble that performance issues on any device will get fixed.

At this point, sadly I think I'll be returning my Mini 4 on Monday.

Phil Schiller lied on stage about iPad Mini 4 being identical to iPad Air 2 but smaller. iPad Mini 4 A8 GPU performance is nearly half that of the iPad Air 2 A8X. No software update is going to fix that.

http://www.apple.com/ipad/compare/
 
Phil Schiller lied on stage about iPad Mini 4 being identical to iPad Air 2 but smaller. iPad Mini 4 A8 GPU performance is nearly half that of the iPad Air 2 A8X. No software update is going to fix that.

http://www.apple.com/ipad/compare/
He certainly did lie. And I doubt at all that it's a bug. I'll be returning mine tomorrow. I regretted paying full price for it anyway this close to Black Friday.
 
Yes but that's largely irrelevant for the multitasking screen, which is just all GPU animations. It doesn't (or shouldn't) take much CPU to position and animate screenshots and icons. I realize the Air 2 has a lot more GPU as well, but I don't think that explains why the Mini 4 performs as badly on this feature as it does ... I just don't see it being a very complicated operation.
Air 2 is 60% faster in GPU compared to mini 4, so not insignificant. I agree that games shouldn't drop frames on new and still very powerful devices such as mini 4, iPhone 6 (Plus), iPhone 5s and iPad Air1/mini 2.
 
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